#include "flutter_window.h"

#include <optional>

#include "flutter/generated_plugin_registrant.h"

FlutterWindow::FlutterWindow(const flutter::DartProject &project)
        : project_(project) {}

FlutterWindow::~FlutterWindow() {}

bool FlutterWindow::OnCreate() {
    if (!Win32Window::OnCreate()) {
        return false;
    }

    RECT frame = GetClientArea();

    // The size here must match the window dimensions to avoid unnecessary surface
    // creation / destruction in the startup path.
    flutter_controller_ = std::make_unique<flutter::FlutterViewController>(
            frame.right - frame.left, frame.bottom - frame.top, project_);
    // Ensure that basic setup of the controller was successful.
    if (!flutter_controller_->engine() || !flutter_controller_->view()) {
        return false;
    }
    RegisterPlugins(flutter_controller_->engine());
    SetChildContent(flutter_controller_->view()->GetNativeWindow());

    flutter_controller_->engine()->SetNextFrameCallback([&]() {
        this->Show();
    });

    return true;
}

void FlutterWindow::OnDestroy() {
    if (flutter_controller_) {
        flutter_controller_ = nullptr;
    }

    Win32Window::OnDestroy();
}

LRESULT
FlutterWindow::MessageHandler(HWND hwnd, UINT const message,
                              WPARAM const wparam,
                              LPARAM const lparam)

noexcept {
// Give Flutter, including plugins, an opportunity to handle window messages.
if (flutter_controller_) {
std::optional <LRESULT> result =
        flutter_controller_->HandleTopLevelWindowProc(hwnd, message, wparam,
                                                      lparam);
if (result) {
return *
result;
}
}

switch (message) {
case WM_FONTCHANGE:
flutter_controller_->engine()->ReloadSystemFonts();
break;
}

return
Win32Window::MessageHandler(hwnd, message, wparam, lparam
);
}
